Anton typlt



. No. 13,079, dated July 4, 1893, and in Italy, N0.

produce paving stones or slabs, as also pat- UNITED STATES PATENT: OFFICE.

ANTON TYPLT, OF MUNICH, GERMANY.

PROCESS OF MAKING PAVING-STONES.

SPECIFICATION forming part of Letters Patent No. 532,118, dated January 8, 1895.

Application filed September 13, 1893. Serial No. 485,409. (No specimens.) Patented in England July 4, 1893. N0- 18,079; in Belgium July 11, 1893,1I0. 105,515; in Italy August 8, 1893,1Io. 34,613, and in Switzerland fieptember 13, 1893,,11'0- 7,568-

the following patents: in Switzerland, No.

7,568, dated September 13, 1893; in Belgium, No. 105,515, dated July 11, 1893; in England,

34,613, dated August 8, 1893,) of which the following is a full, clear, and exact description.

The object of the present invention is to terned slabs and the like, from waste granite, syenite and basalt.

In order to obtain this object eight or nine parts by weight of waste of one or the other of the above mentioned stonesaccording to the color or the kind of slab required to be produced-are added to one hundred parts by weight of magnesia and worked up with a solution of chloride of magnesium, thelatter of a consistency of 25 to 30 Baum, to a thick pulpy mass. The mixture thus obtained is then cast into rigid m0ld,-for instance cast iron molds-and allowed to harden which takes place in about seventy-eight hours.

described.

It is absolutely necessary that the molds into which the mixture is cast be of a rigid unyielding nature, in order to obtain perfectly hard infrangible slabs, the rigid mold preventing the expansion of the mass and consequently compressing and rendering the same more compact.

If it is required to produce patterned ordesigned slabs the coloring matters employed must be of such a nature that the same will easily dissolve in the chloride of magnesium solution and Without changing or losing their color.

I claim as my invention- A process for producing paving and designed slabs and the like, consisting in mixing eight to nine parts of the waste of basalt,3% j

syenite' or granite stone with one hundred parts of magnesia and working the same up with asolution of chloride of magnesium to a thick or pulpy mass and then casting the mass thus obtained into rigid molds, and allowing it to harden there, substantially as In witness whereof I hereunto set my hand in presence of two witnesses.

ANTON TYPLT. Witnesses:

W. BANTZE, H. SOHLOSS. 

